Wow, I never thought I would get such reaction. It also seems that many people disagree with me, but hey since I’m no Jedi, I don’t have to go down like a punk.
Was the sequence effective story telling? I don't think so, but since it seems to have provoked such reaction, negative (those, like me who hated it) and positive (those who felt it conveyed Lucas' point about the Emperor), I would have to say that it had its place in the story. I will even concede that seeing characters I had come to know die, meant that for me this montage was particularly heart tugging. I will have to yield on this one.
Did the Jedi die to easily? Other explanations aside (loss of connection to the force, surprise) I still have a hard time believing that in one generation, the clones are able to take out Jedi, and twenty years later the new bunch get their arses handed to them by ewoks.
Heroic Deaths. I am a storyteller, and a Librarian, I read different types of stories all the time. The type of story that Lucas is trying to tell here makes the heroes larger than life. Heroes like the Jedi, do things that you and I could never do. If you have established the character as a hero, then they get to go out as a hero, not as a redshirt.
Extended Universe vs. Movies. Lucas himself has said the EU is cannon unless contradicted by the movies, indeed the fact that this character was brought into the movie at all, shows that Lucas is willing to acknowledge the EU. Another example is General Grievous coughing for the whole movie due to wounds received in the Clone Wars cartoons. So to say that the backstory of a character brought in from the EU has nothing to do with her fate in the movies, really ignores the fact that by Lucas’ admission and actions the EU DOES exist alongside the movies. Hey, Lucas can do what he wants with his Universe, but I don’t always have to like it, and in this case, I don’t!
Aayla may not be dead. Put me in the “she’s toast” column. However if Greedo can suddenly shoot first, who knows what will happen in future edits. The idea that Lucas might make her a major character in the TV series dosen’t seem right. Lucas himself will direct the first season, and I can’t see him centering the series around a strong female character. Even if he did, I hope he would have the sense to cast an actual actress rather than the production assistant he put into makeup for the movies. No offense to Ms Allen, but she can’t even do getting shot in the back well. 
Sweetums